Local privilege escalation via undisclosed WalletService flaw
Published Mar 11, 2021 · Updated Aug 19, 2026
Elevation of privilege in Microsoft Windows 10 WalletService allows local users with low privileges to gain elevated access. Microsoft has not published the vulnerable code path or the incorrect operation performed by WalletService on attacker-controlled input. Exploitation requires local low-privilege access and no user interaction; success compromises confidentiality, integrity, and availability at elevated privilege.
Summary
What happened
Elevation of privilege in Microsoft Windows 10 WalletService allows local users with low privileges to gain elevated access. Microsoft has not published the vulnerable code path or the incorrect operation performed by WalletService on attacker-controlled input. Exploitation requires local low-privilege access and no user interaction; success compromises confidentiality, integrity, and availability at elevated privilege.
The record
- CVE
- CVE-2021-26871
- Published
- Mar 11, 2021
- Updated
- Aug 19, 2026
- Vendor
- Microsoft
- Product
- Windows 10 Version 1507
- Classifications
- T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 11, 2021CVE publishedPublication date reported by the CVE source.
- Aug 19, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=10.0.10240.0 <10.0.10240.18874
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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